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Flashcards

6. Metals

Grace Isaac Chemistry GCSE English 5.0Average rating 5.0 out of 5 (1 rating) 38 cards

Cards in this deck (38)

  1. 1How can metals be arranged?In order of their reactivity from their reactions with water and dilute acids
  2. 2What do displacement reactions involve?Metals and their compounds in aqueous solution establishing positions within the reactivity series
  3. 3How can copper be obtained?From solutions of copper salts by displacement using scrap iron
  4. 4Where are unreactive metals found?In the earth as the metal its self
  5. 5Where are most metals found?As a compound in the earth, these require chemical reactions to extract the metal
  6. 6How are metals that are less reactive than carbon be extracted from their oxides?By reduction with carbon
  7. 7What is reduction of carbon?The removal of oxygen
  8. 8What is the word equation for the extraction of iron from its ore?iron oxide + carbon → iron + carbon dioxide
  9. 9What is the symbol equation for the extraction of iron from its ore?2Fe2O3 + 3C → 4Fe + 3CO2
  10. 10How are metals that are more reactive than carbon extracted?They are extracted by electrolysis of molten compounds
  11. 11Why is it harder to extract metals by electrolysis?Electrolysis involves the uses of large amounts of energy in the extraction and so it is very expensive
  12. 12How is copper extracted?From copper-rich ores by heating the ores in a furnace (smelting)
  13. 13How is copper purified?By electrolysis
  14. 14What is phytomining?Using plants to absorb metal compounds and then burning the plants to produce ash that contain the metal compounds
  15. 15What is bioleaching?Using bacteria to produce a leachate solution that contains the metal compound
  16. 16What happens at the negative electrode in the extraction of aluminium?Al3+ + 3e- → Al
  17. 17What happens at the positive electrode in the extraction of aluminium2O2- → O2 + 4e-
  18. 18What happens at the negative electrode in the purification of copper?Cu2+ + 2e- → Cu
  19. 19What happens at the positive electrode in the purification of copper?Cu → Cu2++ 2e-
  20. 20How can copper be extracted from solutions of cooper salts using scrap iron?Iron is more reactive than copper, so it can displace copper from copper salts. For example:
    iron + copper sulfate → iron sulfate + copper
  21. 21Why should we recycle metals?Because extracting them uses limited resources, and is expensive in terms of energy and in terms of effects on the environment
  22. 22What do metals consist of?Giant structures of atoms arranged in a regular pattern
  23. 23Why are metals conductive?Because of the delocalised electrons in their structures
  24. 24What does conduction depend of?The ability of electrons to move throughout the metal
  25. 25What are the layers of atoms able to do in metals?Slide over each other, this means that metals can be bent and shaped
  26. 26What are alloys made of?Usually two or more metals
  27. 27Why are alloys useful?Alloys are harder than pure metals because the different sizes of atoms in the metals distort the layers in the structure, making it more difficult for them to slide over each other
  28. 28What are the elements in the central bock of the periodic table known as?The transition metals
  29. 29What are transition metals useful for?They are useful as structural materials and for making things that must allow heat or electricity to pass through them easily (e.g. pans)
  30. 30How much iron does iron from the blast furnace contain?96%
  31. 31Why does iron from the blast furnace have limited uses?The impurities make it brittle and so it has limited uses
  32. 32What is most iron converted into?Steel
  33. 33What are steels?Alloys since they are mixtures of iron with carbon
  34. 34What are low-carbon steels like?They are easily shaped
  35. 35What are high-carbon steels like?They are hard
  36. 36What is stainless steel like?Resistant to corrosion
  37. 37What is copper useful for?Electrical wiring and plumbing
  38. 38What properties does copper have?It is a good conductor, it can be bent, but is hard enough to be used to make pipes or tanks and it does not react with water

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Description
GCSE Chemistry Flashcards on 6. Metals, created by Grace Isaac on 11/05/2016.
Created by
Grace Isaac · May 2016
Updated
Apr 6, 2018
Views
5
Rating
Average rating 5.0 out of 5 (1 rating)

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